1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 Dehumidifier capacity is generally measured by how many pints of water a unit removes from the air in 24 hours. 2  A mini-dehumidifier (1-10 pints) for a bathroom, closet or under a counter usually costs $40-$70.
How To Buy Humidifiers and Dehumidifiers. Humidifiers and dehumidifiers help you maintain the optimal humidity in your home to protect your home and health. A humidifier adds moisture to the air to boost humidity back to comfortable levels, while a dehumidifier extracts moisture from the air to reduce the humidity level. This guide explains the factors to consider so you can be confident youâre selecting the right humidifier or dehumidifier for your needs.